feat(history): full conversation trajectory — GetCascadeTrajectory RPC, all step types rendered

server/index.js

@@ -321,6 +321,15 @@ app.post('/api/bridge/accept-terminal', async (req, res) => {
     }
 });
 
+app.get('/api/bridge/trajectory/:id', async (req, res) => {
+    try {
+        const data = await bridge.getTrajectory(req.params.id);
+        res.json(data);
+    } catch (e) {
+        res.status(502).json({ error: e.message });
+    }
+});
+
 // Bridge WS 이벤트 → 프론트엔드 포워딩
 bridge.connectWs((msg) => {
     broadcastToAll({ type: 'bridge_event', ...msg });